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电力大数据:2019,22(6):-
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南方电网公司覆冰监测系统算法误差分析及模型改进技术研究
姜苏1, 任曦1, 吴建蓉2, 黄良2
(1.中国电力建设集团贵州电力设计研究院有限公司;2.贵州电网有限责任公司电力科学研究院)
Algorithm error analysis and model improvement technology for icing monitoring system of southern Power Grid Corp
JIANG Su1, REN Xi1, WU Jian-rong2, HUANG Liang2
(1.GuiZhou Electric Power Design Research Institute;2.Guizhou Power Grid Co,Ltd a Electric Power Research Institute)
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投稿时间:2018-09-13    修订日期:2019-02-21
中文摘要: 针对目前南方电网架空线路覆冰监测预警系统仍有诸多关键性问题待解决,如在系统核心计算方面参数选取较为简单,没有结合实际线路设计条件,从而造成覆冰预警系统覆冰模型不准确,不能直接为防冰管控工作提供有效决策依据的缺陷。因此,本文首先对系统中现有耐张塔线路覆冰厚度模型计算误差进行分析研究,其次从线路设计角度出发,对其模型进行改进。研究表明:(1)系统中现有计算模型忽略了线路初始设计冰厚、垂直档距变化特征的影响,导线等效长度取值有待商榷;(2)通过改进的计算模型,对初始的拉力值进行修正,同时综合考虑设计冰厚、垂直档距、水平应力、导线状态方程等变化等特征,以贵州省毕节地区耐张塔线路四次线路覆冰过程为例,改进的模型能够将系统现有计算模型准确度由59.8%提升至95.1%,计算结果更加接近于真实值。本文研究所得结论,能够为输电部门为防冰管控工作提供有效决策依据,以及减少人工观冰耗费大量的资源、时间。
Abstract:At present, there are still many key problems to be solved in the monitoring and warning system of overhead lines icing in the South China Power Grid, such as the selection of parameters in the core calculation of the system is relatively simple, and there is no actual line design conditions. Therefore, the model of icing early warning system is inaccurate and can not provide effective decision-making basis for the anti-icing management and control work. Therefore, this paper firstly analyzes the calculation error of the existing ice thickness model of tension tower line in the system, and then improves the model from the point of view of line design. The results show that: (1) the existing calculation models neglect the influence of the initial design ice thickness and the variation characteristics of the vertical gear spacing; (2) the initial tensile force is corrected by the improved calculation model, and the design ice thickness, the vertical gear spacing, the horizontal stress, the traverse equation of state and other characteristics are taken into account. The improved model can improve the accuracy of the existing calculation model from 59.8% to 95.1%, and the calculation results are closer to the real value. The conclusions of this paper can provide effective decision-making basis for the transmission department to provide anti-icing management and control work, and reduce the cost of artificial ice observation resources and time.
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基金项目:北斗卫星电力行业应用关键技术研究及数据应用产业化(黔科合重大专项2018-3007)、输电线路综合防冰关键技术(GZ2015-3-0025)
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